Ventilating and heating system for motor vehicles



a ch D. K. SWARTWOUT VENTILATING AND HEATING SYSTEM FOR MOTOR VEHICLES 3 Sheets-Sheet 1 Fil ed Nov.

March 29, 1927. 1,622,359

D. K. SWARTWOUT VENTILATING AND HEATING SYSTEM FOR MOTOR VEHICLES Filed Nov. 25, 1921 3 Sheets-SheetZ 1,622,359 March 1927' D. K. SWARTWOUT VENTILATING AND. HEATING SYSTEM FOR MOTOR VEHICLES Filed Nov. 25. 1921 3 Sheets-SheetB Patented Mar. 29, 1927.

' UNITED STATES PATENT @FFICE.

BENTON K. SWABTWOUT, 0F CLEFELAND, OHIO.

Application filed November as, 1921. Serial No. 517,206.

This invention relates to a heating and ventilating system for conveyances, and more particularly to' one that 1s peculiarly adapted for use with closed motor vehicles.

The aim of my present invention is to effectually ventilate and, if desired, heat a closed vehicle by withdrawing therefrom the vitiated air and providing a ventilator through which fresh air may be admitted to the vehicle, preferably incorporating in the ventilator meansfor extracting water, moisture or' other foreign substances where with the air may be laden from the air before admitting it to the vehicle, together with means for heating the air at the option of the occupants of the .vehicle.

At the present time I prefer to employ as the means for admitting the air to the vehicle and for heating it, a combined ventilator and heater similar to that disclosed in my copending application entitled Ventilating and heating means for conveyances, filed October 1, 1921, Serial No. 504,814; and to associate with this ventilator and heater, an exhauster connected with a part ofv the vehicle remote from the ventilator and through which a current of air is induced, preferably by utilizing the exhaust gases from the internalcombustion engine of the vehicle in a contrivance operating on the principle of an ejector.

Further objects of the invention are to provide a comparatively simple and highly eflicient means for thoroughly. ventilating a closed vehicle and by which the. air admitted to the vehiclev may be dried and cleaned, and heated to the desired de tee, and which is very durable and immune om disorder an'd'which lends itself very readily to incorporation in existing types of automobiles.

A further object is to provide an arrangement by which any desired amount of the exhaust gasesof the internal combustion engine may be directed through the heater and thence into the exhaust line.

Theforegoin objects, and others which will appear as t is description proceeds, are

attained in the embodiment of the invention illustrated in the drawings accompanying and forming a part of this specification and wherein Fig. 1 represents a side elevation of a closed automobile equipped :vvith my improved ventilating and heating system; Figs. 2 and 3 are enlarged longitudinal sectional views through the front and rear portions of the automobile, respectively, the first showing the ventilator and heater with its connections to the exhaust line, and the second showing the exhauster; Fig. 4 is a transverse vertical section through the ventilator and heater, the same being taken on line 4-4 of Fig. 2; Fig. 5 is a sectional detail on the line 5-5 of Fig. 2; and Fig. 6 is a section on the line 6-.6 of Fig. 3, showing the exhauster.

Following, in all essential respects, the arrangement and construction disclosed in my former application above identified, I mount under the cowl 1 and to the rear of the dash 2 a ventilator casing 3 which opens toward the front of the vehicle through a raised portion 5 of the cowl. An annular header 10 is situated in each end of the casing, and these headers are connected. through tubes 11, and shown as bound together by tie bolts 12 which extend through certain of said tubes. One of the headers has communication through a tube 13 with a valve casing 14 that is situated in the exhaust line 15 of an internal combustion engine -16, and the other has communication through a tube 17 with a T 18'that is also situated in the ex-' haust line. rearwardly of the valve casing 14, the exhaust line leading on, through the mufller 20, to an ejector nozzle 21 that is housed within the exhauster casing 22 that is located below the rear end of the'body of the vehicle. The exhauster. casing 'communicates, through a tube 23, with an outlet opening 24' situated below the rear seat 25, the o ening 24 preferably being covered I I by a gri 26.

A valve 30 is disposed transversely of the valve casing 14 an is connected to a shaft 31 which is journaled within the side walls of the casing toward the rear thereof and has secured to one of its ends, where it projects beyond the side of the casing, an arm 32 to the free end of which is pivotally connected a rod 33 that extends rearwardly and upwardly through the instrument board 35 and is equipped therebeyond with a knob 36 1n convenient reach of the driver. Byreciprocating this rod the valve 30 may be oscillated to deflect any part or all of the exhaust gases from the engine 16 through the tube 13 to the heater comprising the aforementioned headers 10, 10 and tubes 111 Therod 33 is shown as provided with notches 37 for holding engagement with a keeper plate 3.8 whereby the rod a be held in various.

longitudinal positions so as to maintain the valve properly adjusted. The T 18, shown in detail in Fig. 5 has a deflector 'which directs the exhaust gases from the heater rearwardly within the exhaust pipe 15 to properly entrain them within the current flowing through the pipe. By reason of the deflector 40, the current through the exhaust pipe has a tendency to draw the gases from the tube 17, preventing a choking of said tube or the backing up of gases therein.

The ventilator includes a curved wall which directs the incoming air rearwardly about the heater, causing it toiollow the curved, outer wall of the ventilator casing and imparting to the air a swirling action as it passes on to the outlet openingsdd in the ends of the casing. This swirlingaction causes any foreign substance, such as rain,

moisture or dust, to be extracted from the air and dischargedthrough the drain plpe 47 which leads downwardly from the front portion of the casing and through the floor of the vehicle. f

As the exhaust gases are discharged with considerable velocity through the contracted 'end of -ithe nozzle 21, a suction is created within'the exhauster casing 22 which draws the air through the tube 23 from the interior of the vehicle.

Thus it w fl be seen that by my invention a constant changing of the air withm the vehicle, and a very thorough circulation of the air therethrough is efi'ected, the air being cleaned by its passage through the ventilator-and heated to any extent desired ac-,,

cording to the adjustment-of the valve 3.0.

Such an arrangement has the advantages of providing ample ventilation while allowing all windows to be tightly closed so that in inclement weather the occupants of the vehicle are thoroughly protected, and by reason of the nature of the ventilator, it requires no adjustment, and may always be left open. Furthermore, because the outlet openings of the ventilator are directed toward the sides of the vehicle, the air entering therethrough sweeps along the sides and in cold weather, when the air is heated, offsets the efl'ect of any drafts which may enter through the'cracks of the doors or windows. Attention is also called to the fact that by keeping the engine running idly when the automobile is at rest, a circulation of air may equivalent of a forced draft ventilating andheating system under 'bothrunning and standing conditions, and this is decided im provement over installations wherein the heater is merely ,placed in the vehicle with no'means for creating a circulation ofair to properly distribute the heat. It is obvious that shutters may be employed to con trol the passage of air through the ventilator and exhauster, and I have shown associated with the outlet opening 24 a set of adjustable louvers 50 by means of which the passage of air through said opening may be controlled.

Having thus described my invention, what I claim is: v

1. In combination with adenclosed motor vehicle, means utilizing the' exhaust gases from the motor for heati'n air that is discharged into the vehicle and positively withdrawing air from the vehicle.

2. In combination with a motor vehicle, means for admitting air thereto, a heater arranged to heat the air admitted, and

cle,.the heater and said means being actuatedby the exhaust ases from the motor.

means for withdrawing air from the vehi- 3. In combination with an enclosed motor Vehicle, means for admitting air thereto, .a heater arranged to heat the air admitted, an exhauster of the ejector type for withdrawing air fromthe vehicle, connections through which all the exhaust ases from the motor .are directed throng the exhauster, and means whereby any desired quantity of said gases may be by-passed through the heater.

4. In combination with a closed vehicle, means for admitting air thereto, a heater ncorporated in said means .for heating the air admitted to the vehicle, an exhauster conected to apart of the vehicle remote from the air admitting means for withdrawing air from the interior of the vehicle, said ex hauster beingof the ejector type, and means for directing the ;.exhaust gases from the motor'through therheater and through the e ector nozzle' ofi the .exhauster.

5. In combination with a motor vehicle,"

means for admitting air thereto, a heater for heat ng the air, and an exhauster'for with-- drawing air from the vehicle, the exhauster belng'of the ejectortype, an exhaust pipe .from the motor arranged to discharge through the ejector nozzleof the exhauster, a con uit leading from the exhaust pipe to the heater, a second conduit leading from the heater to the exhaust pipe rearwardly of said pipes connection with the former conduit, and means whereby an part or all of the exhaust gases may e deflected through the heater.

6. In combination with a motor vehicle, means for admitting air thereto, a heater for heating said air, an exhauster of the ejector type for withdrawing air from the aehicle, an exhaust pipe leading from the haust pipe for entraining the gases'from the motor and discharging through the ejector last mentioned connections rearwardly into nozzle of the exhauster, connections between .the current of gases flowing through the ex-' 10 the exhaust pipe and the heater, 'connechaust pipe. A

5 tions' between the" heater and a art of the In testimony whereof,'I hereunto aflix my exhaust pipe rearwardly of the ormer consignature. nections, and adeflector situated in the ex- I DENTON K. SWARTWOUT. 

